Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 202125 JulyEvening Shift

Exam: JEE Main
Year: 2021
Date: 25 July
Shift: Evening Shift
Subject: Physics
Chapter: Communication System

JEE Main 2021 · 25 July · Evening Shift · Physics · Communication System

A message signal of frequency 20kHz and peak voltage of 20 V is...

A message signal of frequency

20kHz

and peak voltage of

20

V

is used to modulate a carrier wave of frequency

1MHz

and peak voltage of

20

V

. The modulation index will be:

Correct answer

1

Step-by-step solution

Modulation index

$\mu = \dfrac{{A}_{m}}{{A}_{c}} = \dfrac{20}{20} = 1$

Practice Communication System on Quantrex Academy →

More from Communication System

The height of transmitting antenna is 180m and the height of the receiving antenna is… JEE Main 2023 To radiate EM signal of wavelength λ with high efficiency, the antennas should have a… JEE Main 2023 Match List-I with List-II List-I (Layer of atmosphere) List-II (Approximate height over… JEE Main 2023 The amplitude of 15 ( 1000 ) is modulated by 10 ( 4 ) signal. The amplitude modulated… JEE Main 2023 In satellite communication, the uplink frequency band used is: JEE Main 2023 A transmitting antenna is kept on the surface of the earth. The minimum height of… JEE Main 2023 A massage signal of frequency 3kHz is used to modulate a carrier signal of frequency 1 .… JEE Main 2023 A carrier wave of amplitude 15V is modulated by a sinusoidal base band signal of… JEE Main 2023 Full Communication System list All JEE Main PYQs